Fig. 2

Crude association between hair cortisol concentration and self-perceived stress in AHEAD

AHEAD Acceptance and Commitment Therapy for Health in Adolescents, HCC hair cortisol concentration, pg/mg picograms/milligram. The figure shows the plot of the crude linear regression model. HCC was centered at the median (2.2 pg/mg) for analyses (i.e. median-centered HCC = original value -2.2 pg/mg). The layout of the graph has been modified to ensure that individual observations are unidentifiable. In accordance with this, data from the five patients with the lowest HCC and the five patients with the highest HCC have been removed